Unable to load lists() from MailChimp: (410) Mailchimp API versions 2.0 and Export 1.0 are no longer available. For more information see https://mailchi.mp/7a37f04b6eb2/api-export-10-and-api-20-retirement

{"code":"rest_no_route","message":"No route was found matching the URL and request method","data":{"status":404}}